<!DOCTYPE html>
<html lang="en">
<head>
    <title>Bootstrap Example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- <link rel="stylesheet" href="bootstrap.min.css">
    <script src="jquery.min.js"></script>
    <script src="bootstrap.min.js"></script> -->
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.bootcss.com/bootstrap/3.3.6/css/bootstrap.min.css">
    <script src="//ajax.googleapis.bootcss.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
    <script src="//maxcdn.bootstrapcdn.bootcss.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
    <style type="text/css">
        body {
            position: relative;
        }
        .affix {
            top: 0;
            width: 100%;
            z-index: 9999 !important;
        }
        .navbar {
            margin-bottom: 0;
        }
        .affix ~ .container-fluid {
            position: relative;
            top: 50px;
        }
        #section1 {
            padding-top: 50px;
            height: 500px;
            color: #fff;
            background-color: #1e88e5;
        }
        #section2 {
            padding-top: 50px;
            height: 500px;
            color: #fff;
            background-color: #673ab7;
        }
        #section3 {
            padding-top: 50px;
            height: 500px;
            color: #fff;
            background-color: #ff9800;
        }
        #section41 {
            padding-top: 50px;
            height: 500px;
            color: #fff;
            background-color: #00bcd4;
        }
        #section42 {
            padding-top: 50px;
            height: 500px;
            color: #fff;
            background-color: #009688;
        }
    </style>
</head>
<body data-spy="scroll" data-target=".navbar" data-offset="50">
    <div class="container-fluid" style="background-color: #f44336; color: #fff; height: 200px;">
        <h1>Bootstrap Scrollspy & Affix Example</h1>
        <h3>Fixed (sticky) navbar on scroll</h3>
        <p>Scroll this page to see how the navbar behaves with data-spy="affix".</p>
        <p>The navbar is attached to the top of the page after you have scrolled a specified amount of pixels.</p>
    </div>

    <nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="197">
        <div class="container-fluid">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="javascript:;">WebSiteName</a>
            </div>
            <div class="collapse navbar-collapse">
                <ul class="nav navbar-nav">
                    <li><a href="#section1">Section 1</a></li>
                    <li><a href="#section2">Section 2</a></li>
                    <li><a href="#section3">Section 3</a></li>
                    <li class="dropdown">
                        <a class="dropdown-toggle" data-toggle="dropdown" href="javascript:;">Section 4 <span class="caret"></span></a>
                        <ul class="dropdown-menu">
                            <li><a href="#section41">Section 4-1</a></li>
                            <li><a href="#section42">Section 4-2</a></li>
                        </ul>
                    </li>
                </ul>
            </div>
        </div>
    </nav>

    <div id="section1" class="container-fluid">
        <h1>Section 1</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
    <div id="section2" class="container-fluid">
        <h1>Section 2</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
    <div id="section3" class="container-fluid">
        <h1>Section 3</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
    <div id="section41" class="container-fluid">
        <h1>Section 4 Submenu 1</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
    <div id="section42" class="container-fluid">
        <h1>Section 4 Submenu 2</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
</body>
</html>
